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Finding the Fourth Proportional to 75,115.70, 112,688.16 and 22,520.78

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Solution

The fourth proportional to 75,115.70, 112,688.16 and 22,520.78 is: 33,785.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,115.70 : 112,688.16 = 22,520.78 : x
  2. Step 2: Convert to fraction form
    75,115.70/112,688.16 = 22,520.78/x
  3. Step 3: Cross multiply
    75,115.70x = 112,688.16 × 22,520.78
  4. Step 4: Simplify right side
    75,115.70x = 2,537,825,259.96
  5. Step 5: Solve for x
    x = 2,537,825,259.96/75,115.70
  6. Step 6: Final answer
    x = 33,785.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.